The RF Choke is a must-have with any antenna system. It's a must for Greyline Performance antenna systems. Choose from our default and included with your antenna order sleeve choke. The mini 500W choke and maxi 3500W RF chokers can be added to your order for world-class common mode current choking. These are also known as line isolators and 1:1 current baluns.
Many add extra choking at the radio side to remove CMC at the radio end of the coax and also to help reduce any QRN picked up along the coaxial path to your shack. Let's get every dB we can and use it for good.
Ham radio is fun again!
MINI CHOKE Features:
- Uses proprietary Multi-Mix, Multi-Core, Multi-Turn ferrite technology for maximum choking (up to -38 dB common-mode noise rejection) and maximum bandwidth
- 3500 Watts PEP, 50-ohm SO-239 connectors In/Out, 1-61 MHz
- Works for all coax fed antennas from 1.8-61 MHz (160-6 meters) - excellent for multi-band beams, verticals, dipoles, magnetic loops, and highly unbalanced off-center fed antennas.
- 2-5 times more common-mode noise rejection, wider bandwidth, and higher power than competing isolators
MAXI-CHOKER feed line chokes are used to suppress common mode current carried on the outside of the coax braid which is often responsible for receiver noise and RFI in the receiver/transmitter. These chokes are very useful for suppressing RFI common mode current at the antenna feed point, at 1/2 wavelength intervals along the coax feed line and also at the entrance to the radio station.
This choke is available with a SO-239 input/output and ground/static bleeder stud (optional) for attachment to a ground rod. Use an isolator every 1/2 wavelength for the antenna operating frequency (include velocity factor in the calculation). Use the ground lug option for long coax antenna feed lines (over 1/2 wavelength at the operating frequency of any antenna system in the near field of the coax).
For Lower Power needs use our MINI CHOKE 500W version.